Whale 1/2 in NPT Temperature and Pressure Relief Valve

The Whale temperature and pressure relief valve is a safety replacement part for compatible marine water heaters. It uses a 1/2 in NPT threaded connection and is listed for 6-gallon and 11-gallon hot-water heater applications. The relief setting is specified at a maximum of 100 PSI.

A temperature-and-pressure valve provides a controlled outlet when conditions exceed the heater's permitted limits. It is a safety component, not a normal faucet or flow-control fitting. Correct sizing and matching relief specifications are essential when replacing the original valve.

Before installation, compare the heater manufacturer's requirements with the valve's thread and pressure rating. The discharge route must remain appropriate for the heater's safety system and should never be blocked. Replacing a failed valve does not address an underlying heater pressure or temperature problem, so the water-heating system should also be checked. Follow the heater specifications for the discharge outlet and replacement valve. Browse more water heaters at CritPro.

• 1/2 in NPT threaded connection
• Listed for 6- and 11-gallon heaters
• 100 PSI stated pressure rating
• Temperature and pressure safety relief